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Title: Mass spectrometric immunoassay

Abstract

Rapid mass spectrometric immunoassay methods for detecting and/or quantifying antibody and antigen analytes utilizing affinity capture to isolate the analytes and internal reference species (for quantification) followed by mass spectrometric analysis of the isolated analyte/internal reference species. Quantification is obtained by normalizing and calibrating obtained mass spectrum against the mass spectrum obtained for an antibody/antigen of known concentration.

Inventors:
 [1];  [1];  [2]
  1. (Phoenix, AZ)
  2. (Granbury, TX)
Publication Date:
Research Org.:
Arizona State Univ., Tempe, AZ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
920671
Patent Number(s):
7,303,888
Application Number:
11/459,471
Assignee:
Intrinsic Bioprobes, Inc. (Tempe, AZ) CHO
DOE Contract Number:
FG02-91ER61127
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Nelson, Randall W, Williams, Peter, and Krone, Jennifer Reeve. Mass spectrometric immunoassay. United States: N. p., 2007. Web.
Nelson, Randall W, Williams, Peter, & Krone, Jennifer Reeve. Mass spectrometric immunoassay. United States.
Nelson, Randall W, Williams, Peter, and Krone, Jennifer Reeve. 2007. "Mass spectrometric immunoassay". United States. doi:. https://www.osti.gov/servlets/purl/920671.
@article{osti_920671,
title = {Mass spectrometric immunoassay},
author = {Nelson, Randall W and Williams, Peter and Krone, Jennifer Reeve},
abstractNote = {Rapid mass spectrometric immunoassay methods for detecting and/or quantifying antibody and antigen analytes utilizing affinity capture to isolate the analytes and internal reference species (for quantification) followed by mass spectrometric analysis of the isolated analyte/internal reference species. Quantification is obtained by normalizing and calibrating obtained mass spectrum against the mass spectrum obtained for an antibody/antigen of known concentration.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2007,
month =
}

Patent:

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  • Rapid mass spectrometric immunoassay methods for detecting and/or quantifying antibody and antigen analytes utilizing affinity capture to isolate the analytes and internal reference species (for quantification) followed by mass spectrometric analysis of the isolated analyte/internal reference species. Quantification is obtained by normalizing and calibrating obtained mass spectrum against the mass spectrum obtained for an antibody/antigen of known concentration.
  • Rapid mass spectrometric immunoassay methods for detecting and/or quantifying antibody and antigen analytes utilizing affinity capture to isolate the analytes and internal reference species (for quantification) followed by mass spectrometric analysis of the isolated analyte/internal reference species. Quantification is obtained by normalizing and calibrating obtained mass spectrum against the mass spectrum obtained for an antibody/antigen of known concentration.
  • A new, general method of immunoassay is demonstrated. The approach is based on the microscale immunoaffinity capture of target antigens followed by mass-specific identification and quantitation using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Immunoaffinity capture of antigens effectively overcomes signal suppression effects typically encountered during traditional matrix-assisted laser desorption/ionization analysis of complex biological mixtures while simultaneously concentrating the analyte into a small volume. Sample incubation and processing methods were such that a typical analysis could be performed in less than 1 h while subnanomolar sensitivities were maintained. The technique has been used for the rapid, selective, and quantitative screening ofmore » human blood for the presence of myotoxin a, and Mojave toxin from the venoms of the prairie rattlesnake, Crotalus virdis virdis, and the Mojave rattlesnake, Crotalus scutulatus scutulatus. 18 refs., 8 figs.« less
  • Many cancers, including prostate, breast and lung express parathyroid hormone related protein (PTHrP). Despite the common tumor overexpression of PTHrP, serum levels of PTHrP are not commonly elevated in affected patients. They postulate that the reasons for the discrepancy between tissue and serum measurements of PTHrP are the inadequate sensitivity and specificity of current PTHrP serum assays. To improve the clinical value of PTHrP serum assays for the cancer patient, they are developing a new generation of novel and ultrasensitive PTHrP serum immunoassays based on immunoaffinity purification, nanospray liquid chromatography tandem mass spectrometry (LC/MS/MS) and accelerator mass spectrometry (AMS).
  • The invention relates to a method and apparatus for enhanced sequencing of complex molecules using surface-induced dissociation (SID) in conjunction with mass spectrometric analysis. Results demonstrate formation of a wide distribution of structure-specific fragments having wide sequence coverage useful for sequencing and identifying the complex molecules.